building from mingw windows 10 fails

[delray]

Trying to build flext in order that I can get the py externals working on my system.

After adjusting all the file locations in config-win-max-mingw.txt I get the following:

mingw32-make -f C:/flext-master/buildsys/gnumake-sub.mak  PLATFORM=win RTSYS=max COMPILER=mingw BUILDPATH=C:/flext-master/buildsys/ PKGINFO=package.txt BUILDCLASS=flext USRCONFIG=config.txt USRMAKE=build/gnumake-win-mingw.inc TARGETMODE=release TARGETTYPE=single _build_
mingw32-make[1]: Entering directory 'C:/flext-master'
mingw32-make[1]: *** No rule to make target 'max-mingw\release-single/flbase.opp', needed by 'max-mingw\release-single\libflext-max_s.LIB'.  Stop.
mingw32-make[1]: Leaving directory 'C:/flext-master'
C:\flext-master\buildsys\targets.inc:62: recipe for target 'build-release-single' failed
mingw32-make: *** [build-release-single] Error 2

Here's the first part of my config file:

# where are the Max/MSP SDK header files?
# you should have the latest version!
MAXSDKPATH="C:\Program Files (x86)\Cycling '74\Max 7\resources\packages\max-sdk-7.3.3\source\c74support"

###############################################################

# where do/should the flext headers reside/be built?
FLEXTINC="C:\Program Files (x86)\Cycling '74\Max 7\flext"

# where do/should the flext static libraries reside/be built?
FLEXTLIB=$(FLEXTINC)

# where do/should the flext shared libraries reside/be built?
# (a good place is the MaxMSP program folder)
FLEXTSHLIB="C:\Program Files (x86)\Cycling '74\Max 7"

###############################################################

# where should the external be built?
# (path for temporary files)
OUTPATH=max-mingw

# where should the external be installed?
INSTPATH="C:\Program Files (x86)\Cycling '74\Max 7\externals\flext"

# where should the initialization files be installed?
INITPATH="C:\Program Files (x86)\Cycling '74\Max 7\resources\init"

# where should the help files be installed?
HELPPATH="C:\Program Files (x86)\Cycling '74\Max 7\resources\help\flext"

###############################################################